Canning apparatus.



No. 704,679. Patented luly I5, |902.

J. T. GABNEB.

CANNING APPARATUS.

(Application led Mar. 81, 1902.)

(No Model.)

UNTTnD STATES "PATENT GFFICE.

JOHN THOMAS GARNER, OF GRAYROCK, TEXAS.

CANNING APPARATUS.

sPEcIFcA'rIoN forming part of Letters Patent No. 704,679, dated Juiy 15, 1902.

Application nea Marat si, 1902. serai No. 100,846. (No man.)

T0 all 1072.071?, t may concern:

Be it known that I, JOHN THOMAS GARNER, a citizen of the United States, residing at Grayrock, in the county of Franklin and State of Texas, have invented a new and useful Canning Apparatus, of which the following is a specification.

My invention is an improved canning apparatus, by means of which fruits and vegetables may be preserved in hermetically-sealed cans, my invention relating particularly to the construction of the furnace or heater and the boiler on which the cans filled with fruits or vegetables are placed for the purpose of boiling or heating their contents and of expelling the air from the cans prior to sealing them; and my invention consists in the peculiar construction and combination of devices hereinafter fully set forth and claimed.

In the accompanying drawings, Figure 1 is a vertical longitudinal central sectional view of a canning apparatus embodyingmy improvements. Fig. 2 is a horizontal sectional View of the same, taken on a plane indicated by the line 2 2 of Fig. 1. Fig. 3 is a vertical transverse sectional view of the same, taken on a plane indicated by the line 3 3 of Fig. 2.

In the embodiment of my invention I provide a furnace or heater 5, which may be constructed of brick, metal, or other suitable material and which comprises a combustionchamber 6 and a heating-chamber 7, which communicates therewith, as at 8. The upper side of the heating-chamber is open, and in the same is placed a boiler 9. The boiler is preferably of rectangular form, as here shown, and comprises the lower portion 10, which extends downwardly in the heating-chamber, and the upper portion 11, which is in the form of a pan or tray and is open on its upper side. The upper portion 11 of the boiler extends laterally on opposite sides beyond the sides of the lower portion 10, and the upper portion 11 rests upon and is supportedbythe side walls 12 of the heating-chamber. The length and breadth of the lower portion 10 of the boiler are less than the corresponding dimensions of the heating-chamber, and the depth of the lower portion of the boiler is less than that of the heating-chamber, so that iiues 13 are formed between the sides of the said lower portion 10 of the boiler and the side walls of vthe heating-chamber. A flue 14 is formed bei tween the lower sides of the lower portion 10 of the boiler and the heating-chamber, which flue 14 communicates at its front end with the fire-box 6, as at 8, and a iiue 15 is formed between the proximate rear en ds of the heatingchamber and the lower portion of the boiler, which iiue 15 communicates with a longitudinally-disposed iiue 16, that is formed in and extends forwardly through the lower portion 10 of the boiler and at its front end communicates with a smoke-pipe 17. A water-space 1S is formed in the lower portion of the boiler between the sides of the latter and the sides of the flue 16. Thereby the boiler is provided with heating-surfaces of maximum area and the same becomes highly heated by the flames and heated products of combustion which pass from the iire-box rearwardly through the flues 14 and 13 under and at the sides of the lower portion of the boiler and from thence forwardly through the flue 1G to the smoke-pipe. A suitable quantity of water is kept in the boiler to fill the water-space 1S thereof and to partly fill the upper portion thereof, in which upper portion-the cans are placed on suitable trays. It will be understood that the contents of the cans become heated, that the same may be cooked to the required extent to cause them to be preserved, and that after the tops have been secured on the cans and before the vents thereof have been sealed the contents of the cans may be heated to the extent required to ex-` pel the air therefrom and enable the vents to be sealed, thus hermetically sealing the cans..

The two operations of heating or cooking the contents of the cans and of expelling the air therefrom may be proceeded with simultaneously. In practice my improved apparatus is preferably of such size as to enable several operatives to use the same, so that a number of cans may be treated successively.

I do not desire' to limit myself to the precise construction and combination of devices herein shown and described, as itis evident that modifications may be made therein without departing from the spirit of my invention.

Having thus described my invention, I claim- 1. In combination with a furnace having a {ire-box and a heating-chamber in rear of and IOO communicating therewith and having its upper side open, a boiler disposed in, closing the upper side of the heating-chamber and having an upper portion to overhang and bear upon the sides of the heating-chamber and thereby support the boiler, the latter being further provided with a lower portion of less length, breadth and depth than the oorresponding dimensions of the heating-chamber,lwhereby fines are formed between the sides and bottoms of the lower portion'of the boiler and the heating-chamber, the boiler being further provided with a return -fiue extending therethrough and communicating with a smoke-exit, whereby a water-space is formed in the boiler around the said returniue, substantially as described.

2. In combination with a furnace having a tire-box and a heating-chamber in rear of and communicating therewith and having its upper side open, a boiler disposed inthe heating-chamber, closing the upper side thereof,

having an upper portion forming a tray tov overhang and bear upon the sides of the heating-chamber and thereby support the boiler, the latter being further provided with a lower portion of less length, breadth and depth than the corresponding dimensions of the heating-chamber, whereby iiues are formed between the sides and bottoms of the lower portion of the boiler and the heating-chamber, the boiler being further provided with a retu rn-fiue extending therethrough and communicating with a smokeexit, whereby a water-space is formed in the boiler around the said return flue, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JOHN THOMAS GARNER.

Witnesses: f

J. M. GARNER, W. A. W1LLIA-M s. 

